Day 12

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Module 4 Day 12 Challenge Part 1

Ratios of Rectangles With Square Cut Out

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Module 4 Day 12 Challenge Part 2

Writing Proportions; Definition of Root; Viete's Formulas

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Module 4 Day 12 Challenge Part 3

Quadratics That Can't Be Factored

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Module 4 Day 12 Challenge Part 4

Prof. Loh's Method of Solving Quadratics; Difference of Squares

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@divinedolphin I'm sorry, you are right, Prof. Loh doesn't mention Viete's Formulas in our course, but he does mention it in this explanation video:

https://www.youtube.com/watch?v=XKBX0r3J-9Y

Screenshot from 2020-11-28 14-56-45.png

I think I got a little confused about where Prof. Loh mentioned it originally. 🙂

The spelling of his name varies; sometimes it's spelled as "Vieta," and sometimes it's spelled as "Viete," as shown in Prof. Loh's video.

Screenshot from 2020-11-28 14-53-35.png

🙂
Module 4 Day 12 Challenge Part 5

Using the Average of the Roots

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@divinedolphin Oh no! I'm so sorry! There was an error and the person who made the video was supposed to put the choice iv.) as positive "7/2". In the meantime, until we can fix this error, I've made both choices iv.) and v.) to be correct in the system.

🙏 Thanks so much for letting us know; we will get this fixed asap!
Module 4 Day 12 Challenge Part 6

Radical Roots

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Module 4 Day 12 Challenge Part 7

Derivation of the Quadratic Formula for x² + bx + c = 0 Using Prof. Loh's Method

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Hey @energizedpanda!

Could you specify which problem you're talking about? The forum is telling me Day 12 Part 7 but I don't think that's the right one.
Module 4 Day 12 Challenge Part 8

Derivation of the Quadratic Formula for x² + bx + c = 0 Using Prof. Loh's Method

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Module 4 Day 12 Challenge Part 9

Derivation of the Quadratic Formula for x² + bx + c = 0 Using Prof. Loh's Method

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@divinedolphin Oh no! You are totally right..... The video editor forgot to add the very crucial equation, \( x^2 + 16x + 19 = 0,\) in the question statement.

🤦

Oops! I'm so sorry for this!! Thank you so much for finding this mistake. We really appreciate your help a lot!
Module 4 Day 12 Your Turn Part 1

Real and Imaginary Solutions of a Quadratic

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Your turn
• divinedolphin

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@divinedolphin Oh I see what you mean! The link was outdated because it pointed to a lesson from Module 4 that pre-dated the new Module 4 revision lessons. I've fixed this now. Thank you so much for all of your help! 🙂

Your turn • divinedolphin

Your turn
• divinedolphin